Preparing for your vasectomy
A clear guide to making your decision, getting ready for your appointment, understanding the procedure and knowing what happens afterwards.
Four things to remember
Vasectomy is permanent
It is intended as permanent contraception. Only proceed if you are sure you do not want children, or any more children, in the future.
Consider it irreversible
Reversal can sometimes be attempted, but it is not reliably successful. You must not rely on reversal to restore fertility later.
It does not work immediately
You may still cause a pregnancy after surgery. Keep using reliable contraception until we have formally confirmed your semen-test clearance in writing.
Complications can occur
Possible problems include bleeding, infection, persistent scrotal or testicular pain, and occasional failure or reconnection of the tubes. Further treatment may be needed.
Your vasectomy journey
Four essentials before you proceed. Open the sections further down for the details.
Think permanent
Be certain you do not want children, or any more children, in the future.
Get ready
Hair removal, supportive underwear, a drink, paracetamol and a lift home.
Make time to rest
Plan at least the first 48 hours with minimal activity and follow your aftercare advice.
Get the all-clear
Our first semen test is at four months, after at least 25 ejaculations.
Your preparation checklist
- Read the information and consent guidance and ask us about anything you are unsure of.
- Tell us about medicines or health issues, particularly blood thinners, immune-suppressing treatment, allergies or previous scrotal surgery.
- Remove hair around the operation site: shave scrotal hair and any pubic hair that may get in the way, ideally at least 24 hours beforehand. Alternatively trim, or use only a suitable genital-area hair-removal cream at least 48 hours beforehand.
- Shower or bathe on the day and wear supportive briefs and comfortable, loose-fitting clothes.
- Bring a drink: water is fine, or ideally an electrolyte drink containing some sugar if you do not have diabetes. If you have diabetes, choose a drink appropriate for your glucose management.
- Bring paracetamol: in case pain starts during a delayed journey home. Use paracetamol only for pain relief during the first 48 hours if it is safe for you; avoid ibuprofen and alcohol during that period.
- Arrange transport home: do not drive yourself after the procedure; arrange a lift or suitable alternative transport.
- Allow time to recover: rest for the first 48 hours and avoid arranging strenuous work, sport or heavy lifting immediately afterwards.
Everything you need to know
Select a question below to expand the information. You can open more than one section at a time.
01Is vasectomy the right choice for me?Permanence, suitability, alternatives and consultation
Vasectomy is a highly effective form of contraception that works by preventing sperm from entering your semen. You should make the decision on the basis that it is permanent. Reversal is not reliably successful and is not usually available on the NHS.
Whether you are married or single, have children or have none, what matters is that you understand the procedure and are confident in your choice. If you are young, have no children, are experiencing major relationship or personal changes, or think you might want children later, we may recommend additional counselling and time for reflection.
If you feel uncertain, we advise postponing the procedure and discussing reversible alternatives. You can request a discussion with a surgeon instead of relying on the online consultation alone. Your consent must be informed and voluntary.
02How should I prepare beforehand?Hair removal, medicines, drinks and pain relief
Tell us about your health
Please tell us if you have had previous testicular or scrotal surgery, have a known bleeding problem, have difficulty with previous procedures, or have a condition or treatment that could affect wound healing. Previous surgery or anatomy can mean that an examination or additional assessment is helpful.
Do not stop prescribed medicines on your own. Let us know about anticoagulants or antiplatelet medicines (for example warfarin, apixaban, rivaroxaban, aspirin or clopidogrel), immune-suppressing treatments, medication allergies or any change in your health since your consultation. We will advise whether individual precautions are needed.
Practical preparation
- Have a shower or bath on the morning of surgery.
- Wear close-fitting, supportive underwear (rather than loose boxer shorts) and comfortable clothes.
- Hair removal: shave the hair on your scrotum and any pubic hair that could get in the way of the procedure, ideally at least 24 hours before surgery. Alternatively, carefully trim the hair. A hair-removal cream is another option at least 48 hours beforehand, but only use a product specifically marked as suitable for the area you are treating, including scrotal skin. Follow its instructions carefully. Do not use products on broken or irritated skin, and let us know if the area becomes sore or damaged.
- You can generally eat and drink normally before a procedure under local anaesthetic unless we have advised otherwise.
- Bring a drink with you: water is suitable, or ideally an electrolyte drink containing some sugar if you do not have diabetes. If you have diabetes, choose a drink appropriate for your usual glucose management.
- Bring paracetamol: keep it with you in case your journey home is delayed and you need pain relief when the local anaesthetic wears off. Follow the recommended dose and only take it if it is safe for you.
- Arrange for someone to take you home, or use suitable alternative transport. Do not plan to drive yourself.
03What happens on the day?Local anaesthetic and the non-scalpel procedure
We usually perform a non-scalpel vasectomy under local anaesthetic. You remain awake. The anaesthetic is injected into the scrotal skin and around the sperm-carrying tubes, not into the testicles. The injection may briefly sting; after it takes effect you may notice pressure or movement, but you should tell your surgeon if you feel pain.
Through a small opening in the scrotum, the surgeon identifies the two tubes (vas deferens) that carry sperm. Each is divided and sealed, commonly using cautery. Often both can be reached through a single opening. Occasionally the approach, dressing or need for a stitch is different because of individual anatomy or circumstances.
The team will explain what is happening and answer questions. You will be given instructions before leaving and should rest at home afterwards.
04What will recovery involve?Rest, work, driving, sexual activity and aftercare
Mild to moderate discomfort, bruising and swelling are common in the first few days. Supportive underwear and the pain relief recommended by your team are usually helpful. Follow the wound-care and activity instructions we give you.
- Rest: plan to rest with minimal activity for the first 48 hours. Physical jobs, sport and lifting may need a longer pause.
- Pain relief and alcohol: use paracetamol only if suitable for you during the first 48 hours. Avoid ibuprofen, other anti-inflammatory painkillers and alcohol for those 48 hours, unless individually advised otherwise.
- Driving: we advise avoiding driving for at least the first 24 hours, often 24–48 hours. Only resume when comfortable and able to carry out an emergency stop safely; check your insurer if necessary.
- Sex: usually avoid sexual activity for about a week and resume only when comfortable, in line with your individual aftercare advice.
- Contraception: you can still cause a pregnancy until we formally confirm your semen result. Continue reliable contraception every time.
Follow the full, detailed Vasectomy Aftercare Instructions. They take precedence over this brief summary when planning your recovery.
05What are the risks and complications?Common healing effects, rare problems and when to get help
Most people recover without a serious complication, but all surgery carries risks. The main issues to understand include:
- Bruising, bleeding or haematoma: blood can collect in the scrotum and sometimes cause a painful swelling.
- Infection: worsening redness, heat, tenderness, discharge or fever may need treatment.
- Sperm granuloma: a small, sometimes tender lump can develop where sperm leak from the sealed tube.
- Persistent scrotal or testicular pain: a small minority develop longer-term pain, which may occasionally affect everyday life and require assessment or treatment.
- Failure: sperm may persist after the procedure or the tubes may occasionally reconnect. Further testing, and rarely another procedure, may be necessary. There remains a very small risk of pregnancy even following clearance.
Often part of normal healing
Some bruising, tenderness, minor spotting and a little swelling should gradually improve.
Get medical advice promptly
Rapidly increasing swelling, persistent bleeding, severe or worsening pain, fever, spreading redness or pus require assessment.
If you are worried, contact our team or your GP. Use NHS 111 for urgent advice when the service is unavailable, and attend A&E for severe symptoms or significant bleeding.
06Will it affect hormones, ejaculation or sexual enjoyment?What changes, what stays the same and STI protection
Vasectomy prevents sperm from reaching the semen. Your body still makes sperm, which are naturally broken down and reabsorbed. Most of the fluid you ejaculate comes from glands other than the testicles, so semen volume changes very little.
Vasectomy does not reduce testosterone production and does not normally affect erections, orgasm or sexual enjoyment. It does not protect against sexually transmitted infections; use condoms if STI protection is needed.
07When am I actually cleared of sperm?Four months, 25 ejaculations and your formal results
Sperm already present beyond the sealed tubes can remain in the reproductive tract after surgery. This is why vasectomy is not immediately effective.
Our current MCS pathway: provide your first semen sample no earlier than four months (16 weeks) after surgery, and after at least 25 ejaculations. Follow the instructions supplied with your sample kit, including collection and posting requirements. Do not send multiple samples at once unless asked.
If sperm are still present, you may need further tests. We will tell you what happens next. Continue reliable contraception until you receive our formal written all-clear.
Your semen test is the final step
National providers may use different testing schedules. Follow the instructions from our service rather than submitting a sample early.
Until written clearance arrives, continue contraception.
Where would you like to go next?
Use these pages for more detailed service information, and contact us if you need to discuss your individual circumstances.
Show retired pre-operative information (version before 9 October 2026)
Previous version retained for historical reference only. This wording is no longer the current advice and may contain outdated clinical details or links. Please follow the updated information above and the advice given by your clinical team.
Please note this page is under review
You may wish to also print this page for your records.
Additional / Alternative information can be found here.
Vasectomy: General Information
Vasectomy is one of the safest, simplest and most effective methods of contraception, but because it should also be considered permanent, it is important you are fully informed before deciding to proceed.
In the United Kingdom vasectomy has become a very popular form of contraception and is now relied upon by more than half a million couples.
We rarely have a waiting list of more than a month at our centre. The technique used by our specially trained surgeon can normally be completed in a few minutes. After you have completed this online consultation that has been created by our own very experienced and knowledgeable Surgeon Mr A Ahmed, if all the information needed by you and by us is completed during this process, we can proceed to surgical procedure very quickly. If further information is needed by you or by us, or further clarification is required we will arrange a consultation.
Suitability for Vasectomy
We will consider you for a vasectomy if you have seriously thought about the implications of your decision and you are sure you have had all the children you will ever want. This applies equally whether you are married, single, divorced, widowed, childless or with families, regardless of age. However, if you are in your early twenties or under, we are likely to arrange a further consultation after you have completed this form. This will allow for further consultation and counselling and give you the opportunity to discuss your decision, whilst allowing time for further consideration. In addition, we strongly advise you not to undergo vasectomy if you have any sexual or personal problems, as this is not a good time to make such an irrevocable decision.
The vasectomy procedure must be seen as permanent. If reversal is a concern while you are considering vasectomy, or if you think there is a chance you will change your mind in later life as a result of changed circumstances, we strongly advise you to postpone the decision until you are one hundred per cent sure that you want no more children under any circumstances.
For these reasons if you feel under confident about arranging for the operation using an online consultation process, you are welcome to arrange a consultation with one of our surgeons, when he can discuss these issues with you before booking you for surgery.
The Operation
Sperm makes up approximately five per cent of the fluid ejaculated at orgasm. The procedure of the operation is to stop the sperm being ejaculated by sealing the tubes (vas deferens) which carry the sperm to the fluid. The fluid originates in glands at the base of the penis and the quantity produced is unaffected by the operation.
Please shave the scrotum before you arrive as this is helpful but not essential. The doctor gives you a small injection of local anaesthetic into the skin of the scrotum, the sac holding the testicles, not the testicles themselves. The local anaesthetic used is much the same as used by dentists, therefore the sensation felt is similar, an initial stinging followed by complete numbness of the area. A small incision is made in the scrotum and the tubes are located and fused using cautery (a process which seals both the tubes using heat). No internal or external stitches are used, but a small dressing will be applied to the site of the incision.
This may be the first time you have had an operation. The doctor and nurse present during the operation do not wear masks and will talk to you throughout the procedure, and do their best to help you relax. Remember to wear a pair of supportive underwear on the day to help support the scrotum and dressings. You may want to bring paracetamol with you just in case you are delayed on the way home due to traffic etc and the anaesthetic starts to wear off.
Do not drive for the first 24 hours after vasectomy as there are uncommon case of fainting reported even several hours after surgery.
After the Operation
Please read the full instructions on what to expect and what to do after your vasectomy here. We also go over the main points on the day of surgery. It is important to have understand what you need to do after the operation before you have it so you can plan for your needs in advance.
If you have had any previous testicular surgery, it may be advisable for you to come in for an examination and assessment. Please telephone our office for advice on this or to discuss any other concerns. Complications, although very rare, can occur with surgical procedure, however minor, and if you are worried about anything please feel free to call us or your GP for advice.
Complications to be aware of:
- Blood clot in the scrotum. A little swelling and bruising are usual, if you develop a large painful swelling, please contact Mr Ahmed or you own GP.
- Infection. A little ooze is usual but if after a few days the scrotum is hot, tender or oozing pus, please see your doctor in case an antibiotic is required.
- Painful nodule. This can occur where the tubes are divided, about six weeks after the operation. They usually settle by themselves.
- Testicular pain after the operation, which rarely can persist.
- Operation failure. This is very rare – at a rate of less then 0.4% of operations. You may remain fertile after the operation or the tubes can theoretically join up months or years after the operation.
You can have sex as soon as you feel it will be comfortable; however we advise you to wait a few days.
Because there are still sperm in the vas deferens above the site of the operation it can take quite a number of ejaculations to clear the sperm. It is essential to continue using an alternative method of contraception until you are informed by us that your system is clear of the sperm. We require one sample of your sperm at four months post operatively (after a minimum of 25 ejaculations). However occasionally, several more tests may be required, until the system is completely free of sperm. If this should happen we will advise you, so initially please supply only one sample until you have heard from us. In very rare cases the tubes may not have been sealed completely or the sealed ends of the tubes may grow back together again. Since this usually happens in the first three months, we are able to detect this by testing the semen. Spontaneous rejoining of the tubes can occasionally occur even after tests have proved negative, sometimes years later, but this is extremely rare.
In the very rare case when the sperm does not clear or the tubes rejoin spontaneously, we will arrange a re-operation for you. Although in recent years there have been studies linking vasectomy with testicular and prostate cancer, the evidence is only very marginal as compared with the non-vasectomised population. Vasectomy continues to be a recommended family planning method worldwide.
Many couples find greater sexual freedom once the risk of unwanted pregnancy has been removed. Orgasm and ejaculation are not affected. Sperm continues to be produced by the testicles but its passage to the penis is blocked, so it is re-absorbed by the body, just as the body continually re-absorbs all unused cells.
Vasectomy has absolutely no effect on the production of male hormones; the difference is purely mechanical in that the semen no longer contains sperm.